Process of manufacture of dye-soap



UNITED STATES PATENT car es,

CLINTON S. ROIBISON, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALADDIN PRODUCTS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PROCESS OF MANUFACTURE OF DYE-SOAP.

No Drawing.

useful Improvement in Processes of Manufacture of Dye-Soap, of which the following is a full, clear, concise, and exact de scription.

My invention relates to the manufacture of soap and is concerned particularly with the production of so-called dye-soap, that is, a soap which carries an excess of dye for transfer to the fabric during washing.

It is the purpose of my invention to provide an improved dye-soap, a dye-soap in which the following matter is uniformly distributed, which is transparent, which does not lose its dye by ordinary handling and which retains its cleansing properties without sacrificing effectiveness in its coloring property.

Broadly my invention contemplates the manufacture of dye-soap of vegetable oils, tallow, and an excess of coloring matter; more specifically my invention contemplates the use of certain ingredients under certain conditions, and I have drawn the appended claim accordingly.

The specific compoundand process which I shall describe, in order to instruct those skilled in the art, I have determined by careful experimentation and I shall proceed to set forth the precise manner in which I produce the dye-soap of my invention, drawing the most specific of.the appended claim toward the precise compound and process thus set forth.

I may state parenthetically that soap compounds high in percentage of alkali are not desirable, since the alkali tends to re-act with the added dye and destroy its coloring properties.

In the formation of the soap base I mix 10 kilos of cocoanut oil, ten kilos of castor oil and 8 kilos of tallow, saponification being then carried out by the use of 14 kilos of 38 degree Baum caustic soda at a heat of 50 degrees centigrade, the mass being constantly stirred at this maintained tem- Specification of Letters Patent. Patented S pt 21 1920.

Application filed ()ctober 25, 1917. Serial No. 198,402.

' perature until it reaches a pasty consistency.

8 kilos of granulated sugar are then dissolved 1n 8;; liters of water and this is added to the above mixture at 85 degrees centigrade. The compound is then neutralized by the proper addition of cocoanut oil and fatty acids and it is then ready for the reception of the dye.

The pigment is dissolved in a mixture conslstlng of 500 c. c. of water and 5 liters of methyl alcohol. The soap base, as above prepared, is cooled to 60 degrees centigrade, when the dye mixture, thus prepared, is added with constant stirring. After the complete distribution of the dye has been perfected, the compound is poured through a filter into frames and allowed to cool and thereupon the usual steps of slabbing, cutting and pressing may ensue.

The' proportion of dye mixture to base mixture is considerably in excess of any ordinary proportion to tint the soap, but the transparent quality is retained, thus producing a transparent dye-soap of the characteristics hereinbefore set forth.

The sugar clarifies the soap and the alcohol acts not only as a solvent for the dye but also toassist in this clarification, for which purpose glycerin may also be used.

The minimum percentage of dye is not to be less than 15/100 of one per cent.

I claim:

I he process of making a dye-soap which comprises saponifying a mixture of cocoanut 011, castor oil and tallow, in the proportlon of 10, 10 and 8, respectively, with 38 degrees Baum caustic soda in the proportion of 14: at 50 degrees centigrade, adding CLIN TON S. ROBISON, 

